If it's too late to 'graciously' back out, I suggest OP back out without grace.
OP, get the locks changed if you have to. Don't let this person into your home if you don't trust them. The anxiety you're having already says enough about how this will impact your mental health.
AlekiaoftheNorth t1_j4k9asl wrote
Reply to comment by achatteringsound in LPT Request: How to ensure that a person doesn't use my personal belongings while staying at my place? by [deleted]
If it's too late to 'graciously' back out, I suggest OP back out without grace.
OP, get the locks changed if you have to. Don't let this person into your home if you don't trust them. The anxiety you're having already says enough about how this will impact your mental health.